TAILIEUCHUNG - Biomass 2012 Part 5

Tham khảo tài liệu 'biomass 2012 part 5', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | Measurement and Assessment Methods of Forest Aboveground Biomass A Literature Review and the Challenges Ahead 53 Researcher Tropical Forest Equation Brown et al. 1989 Wet M e pwD2H Brown 1997 Dry M Brown 1997 Moist M e ln D Martínez-Yrizar et al. 1992 Dry M 10 Log10 BA Návar et al. 2010 Dry M Návar et al. 2010 Dry M e Ln D2H Návar 2010a All M D B d hB Návar 2010b All M D238 Chavé et al. 2005 Dry M pwD2H Dry M pw e D D D Chavé et al. 2005 Moist M pwD2H Moist M pw e D D D 3 Chavé et al. 2005 Wet M pwD2H Wet M pw e D D D 3 3 Where The non-destructive method proposed by Návar 2010a uses the H-D and V H D . H ahDB and V avDdHh equations and an empirical equation to estimate a D diameter at breast height BA basal area pw wood specific gravity. Table 3. Allometric equations employed in aboveground biomass estimation for eight tropical forest communities of Mexico. Total aboveground biomass deviations for all tropical forests inventoried between either a allometric equations or b allometric and the physics equation were smallest when using the non-destructive model proposed by Návar 2010a . The equations of Brown 1997 for tropical dry forests and the equation of Návar 2010a yielded consistent plot M estimates across allometric equations and methods. Deviations as large as orders of magnitude were found . see for example stand M assessments by the Brown 1997 and the physics equation for moist forests or the non-destructive method II and the local equation developed by Návar 2009 for tropical dry forests. Future directions in stand M assessments The large deviations due to the application of allometric models or methods developed off site reveal that probabilistic plot M estimates are .

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